It’s summertime and the living is easy” is a favourite expression at this time of year. But health hazards don’t care what month it is. You can stub your toe at any time. And, for instance, how many parents worry that their children face a hazard simply by brushing their teeth, summer or winter? Can a roller coaster ride cause more than thrills? Can binge drinking result in more than a hangover? And, in summer, never mess around with 300,000,000 volts.